ﻻ يوجد ملخص باللغة العربية
In this paper we present a simple color-magnitude selection and obtain a large sample of 33,893 massive quiescent galaxies at intermediate redshifts (1<z<1.5). We choose the longest wavelength available in the Hyper-Supreme-Cam (HSC) deep survey, the Y band and i-Y color, to select the 4000A Balmer jump in passive galaxies to the highest redshift possible within the survey. With the rich multi-wavelength data in the HSC deep fields, we then confirm that the selected galaxies are in the targeted redshift range of 1<z<1.5, lie in the passive region of the UVJ diagram, and have high stellar masses at log(M*/M_sun)>10.5, with a median of log(M*/M_sun)=11.0. A small fraction of our galaxies is also covered by the HST CANDELS. Morphological analysis in the observed H band shows that the majority of this subsample are early-type galaxies. As massive early-type galaxies trace the high density regions in the large scale structure in the universe, our study provides a quick and simple way to obtain a statistical significant sample of massive galaxies in a relative narrow redshift range. Our sample is 7-20 times larger at the massive end (log(M*/M_sun)>10.5) than any existing samples obtained in previous surveys. This is a pioneer study, and the technique introduced here can be applied to future wide-field survey to study large scale structure, and to identify high density region and clusters.
In the early Universe finding massive galaxies that have stopped forming stars present an observational challenge as their rest-frame ultraviolet emission is negligible and they can only be reliably identified by extremely deep near-infrared surveys.
We report a massive quiescent galaxy at $z_{rm spec}=3.0922^{+0.008}_{-0.004}$ spectroscopically confirmed at a protocluster in the SSA22 field by detecting the Balmer and Ca {footnotesize II} absorption features with multi-object spectrometer for in
In this letter, we reconstruct the formation pathway of MRG-S0851, a massive, $log M_*/M_odot=11.02pm0.04$, strongly lensed, red, galaxy at $z=1.883pm0.001$. While the global photometry and spatially-resolved outskirts of MRG-S0851 imply an early-for
Unlike spiral galaxies such as the Milky Way, the majority of the stars in massive elliptical galaxies were formed in a short period early in the history of the Universe. The duration of this formation period can be measured using the ratio of magnes
Deep ALMA and HST observations reveal the presence of a quenched massive galaxy within the $z=2.91$ galaxy group RO-1001. With a mass-weighted stellar age of $1.6 pm 0.4 ,$Gyr this galaxy is one of the oldest known at $zsim3$, implying that most of i